hi, would appreciate any comments or thoughts on this

i've received multiple verbal offers from statboards and ministries, for 2 of them, after i submitted my documents i.e ns stuff, uni poly transcripts, they called me a week later and said they are going with another candidate or they are going thru restructuring and cannot hire. what are the chances these are not true and they just found a problem with my references/security clearance? or is this just coincidental? ive read that they wouldnt reveal why you failed anyway, but im curious to find out more if anyone has insider info

asking because ive been very deep into my job search and if this is a tell tale sign that i will not pass approvals/checks then i should not be wasting my time on civil service. just feeling really down because its hard to even get a verbal offer let alone a real one and a job